| /* |
| * MP3 window subband -> subband filtering -> mdct routine |
| * |
| * Copyright (c) 1999-2000 Takehiro Tominaga |
| * |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| * Boston, MA 02111-1307, USA. |
| */ |
| |
| /* |
| * Special Thanks to Patrick De Smet for your advices. |
| */ |
| |
| /* $Id: newmdct.c,v 1.37 2008/04/22 23:01:22 robert Exp $ */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include "lame.h" |
| #include "machine.h" |
| #include "encoder.h" |
| #include "util.h" |
| #include "newmdct.h" |
| |
| |
| |
| #ifndef USE_GOGO_SUBBAND |
| static const FLOAT enwindow[] = { |
| -4.77e-07 * 0.740951125354959 / 2.384e-06, 1.03951e-04 * 0.740951125354959 / 2.384e-06, |
| 9.53674e-04 * 0.740951125354959 / 2.384e-06, 2.841473e-03 * 0.740951125354959 / 2.384e-06, |
| 3.5758972e-02 * 0.740951125354959 / 2.384e-06, 3.401756e-03 * 0.740951125354959 / 2.384e-06, 9.83715e-04 * 0.740951125354959 / 2.384e-06, 9.9182e-05 * 0.740951125354959 / 2.384e-06, /* 15 */ |
| 1.2398e-05 * 0.740951125354959 / 2.384e-06, 1.91212e-04 * 0.740951125354959 / 2.384e-06, |
| 2.283096e-03 * 0.740951125354959 / 2.384e-06, 1.6994476e-02 * 0.740951125354959 / 2.384e-06, |
| -1.8756866e-02 * 0.740951125354959 / 2.384e-06, -2.630711e-03 * 0.740951125354959 / 2.384e-06, |
| -2.47478e-04 * 0.740951125354959 / 2.384e-06, -1.4782e-05 * 0.740951125354959 / 2.384e-06, |
| 9.063471690191471e-01, |
| 1.960342806591213e-01, |
| |
| |
| -4.77e-07 * 0.773010453362737 / 2.384e-06, 1.05858e-04 * 0.773010453362737 / 2.384e-06, |
| 9.30786e-04 * 0.773010453362737 / 2.384e-06, 2.521515e-03 * 0.773010453362737 / 2.384e-06, |
| 3.5694122e-02 * 0.773010453362737 / 2.384e-06, 3.643036e-03 * 0.773010453362737 / 2.384e-06, 9.91821e-04 * 0.773010453362737 / 2.384e-06, 9.6321e-05 * 0.773010453362737 / 2.384e-06, /* 14 */ |
| 1.1444e-05 * 0.773010453362737 / 2.384e-06, 1.65462e-04 * 0.773010453362737 / 2.384e-06, |
| 2.110004e-03 * 0.773010453362737 / 2.384e-06, 1.6112804e-02 * 0.773010453362737 / 2.384e-06, |
| -1.9634247e-02 * 0.773010453362737 / 2.384e-06, -2.803326e-03 * 0.773010453362737 / 2.384e-06, |
| -2.77042e-04 * 0.773010453362737 / 2.384e-06, -1.6689e-05 * 0.773010453362737 / 2.384e-06, |
| 8.206787908286602e-01, |
| 3.901806440322567e-01, |
| |
| |
| -4.77e-07 * 0.803207531480645 / 2.384e-06, 1.07288e-04 * 0.803207531480645 / 2.384e-06, |
| 9.02653e-04 * 0.803207531480645 / 2.384e-06, 2.174854e-03 * 0.803207531480645 / 2.384e-06, |
| 3.5586357e-02 * 0.803207531480645 / 2.384e-06, 3.858566e-03 * 0.803207531480645 / 2.384e-06, 9.95159e-04 * 0.803207531480645 / 2.384e-06, 9.3460e-05 * 0.803207531480645 / 2.384e-06, /* 13 */ |
| 1.0014e-05 * 0.803207531480645 / 2.384e-06, 1.40190e-04 * 0.803207531480645 / 2.384e-06, |
| 1.937389e-03 * 0.803207531480645 / 2.384e-06, 1.5233517e-02 * 0.803207531480645 / 2.384e-06, |
| -2.0506859e-02 * 0.803207531480645 / 2.384e-06, -2.974033e-03 * 0.803207531480645 / 2.384e-06, |
| -3.07560e-04 * 0.803207531480645 / 2.384e-06, -1.8120e-05 * 0.803207531480645 / 2.384e-06, |
| 7.416505462720353e-01, |
| 5.805693545089249e-01, |
| |
| |
| -4.77e-07 * 0.831469612302545 / 2.384e-06, 1.08242e-04 * 0.831469612302545 / 2.384e-06, |
| 8.68797e-04 * 0.831469612302545 / 2.384e-06, 1.800537e-03 * 0.831469612302545 / 2.384e-06, |
| 3.5435200e-02 * 0.831469612302545 / 2.384e-06, 4.049301e-03 * 0.831469612302545 / 2.384e-06, 9.94205e-04 * 0.831469612302545 / 2.384e-06, 9.0599e-05 * 0.831469612302545 / 2.384e-06, /* 12 */ |
| 9.060e-06 * 0.831469612302545 / 2.384e-06, 1.16348e-04 * 0.831469612302545 / 2.384e-06, |
| 1.766682e-03 * 0.831469612302545 / 2.384e-06, 1.4358521e-02 * 0.831469612302545 / 2.384e-06, |
| -2.1372318e-02 * 0.831469612302545 / 2.384e-06, -3.14188e-03 * 0.831469612302545 / 2.384e-06, |
| -3.39031e-04 * 0.831469612302545 / 2.384e-06, -1.9550e-05 * 0.831469612302545 / 2.384e-06, |
| 6.681786379192989e-01, |
| 7.653668647301797e-01, |
| |
| |
| -4.77e-07 * 0.857728610000272 / 2.384e-06, 1.08719e-04 * 0.857728610000272 / 2.384e-06, |
| 8.29220e-04 * 0.857728610000272 / 2.384e-06, 1.399517e-03 * 0.857728610000272 / 2.384e-06, |
| 3.5242081e-02 * 0.857728610000272 / 2.384e-06, 4.215240e-03 * 0.857728610000272 / 2.384e-06, 9.89437e-04 * 0.857728610000272 / 2.384e-06, 8.7261e-05 * 0.857728610000272 / 2.384e-06, /* 11 */ |
| 8.106e-06 * 0.857728610000272 / 2.384e-06, 9.3937e-05 * 0.857728610000272 / 2.384e-06, |
| 1.597881e-03 * 0.857728610000272 / 2.384e-06, 1.3489246e-02 * 0.857728610000272 / 2.384e-06, |
| -2.2228718e-02 * 0.857728610000272 / 2.384e-06, -3.306866e-03 * 0.857728610000272 / 2.384e-06, |
| -3.71456e-04 * 0.857728610000272 / 2.384e-06, -2.1458e-05 * 0.857728610000272 / 2.384e-06, |
| 5.993769336819237e-01, |
| 9.427934736519954e-01, |
| |
| |
| -4.77e-07 * 0.881921264348355 / 2.384e-06, 1.08719e-04 * 0.881921264348355 / 2.384e-06, |
| 7.8392e-04 * 0.881921264348355 / 2.384e-06, 9.71317e-04 * 0.881921264348355 / 2.384e-06, |
| 3.5007000e-02 * 0.881921264348355 / 2.384e-06, 4.357815e-03 * 0.881921264348355 / 2.384e-06, 9.80854e-04 * 0.881921264348355 / 2.384e-06, 8.3923e-05 * 0.881921264348355 / 2.384e-06, /* 10 */ |
| 7.629e-06 * 0.881921264348355 / 2.384e-06, 7.2956e-05 * 0.881921264348355 / 2.384e-06, |
| 1.432419e-03 * 0.881921264348355 / 2.384e-06, 1.2627602e-02 * 0.881921264348355 / 2.384e-06, |
| -2.3074150e-02 * 0.881921264348355 / 2.384e-06, -3.467083e-03 * 0.881921264348355 / 2.384e-06, |
| -4.04358e-04 * 0.881921264348355 / 2.384e-06, -2.3365e-05 * 0.881921264348355 / 2.384e-06, |
| 5.345111359507916e-01, |
| 1.111140466039205e+00, |
| |
| |
| -9.54e-07 * 0.903989293123443 / 2.384e-06, 1.08242e-04 * 0.903989293123443 / 2.384e-06, |
| 7.31945e-04 * 0.903989293123443 / 2.384e-06, 5.15938e-04 * 0.903989293123443 / 2.384e-06, |
| 3.4730434e-02 * 0.903989293123443 / 2.384e-06, 4.477024e-03 * 0.903989293123443 / 2.384e-06, 9.68933e-04 * 0.903989293123443 / 2.384e-06, 8.0585e-05 * 0.903989293123443 / 2.384e-06, /* 9 */ |
| 6.676e-06 * 0.903989293123443 / 2.384e-06, 5.2929e-05 * 0.903989293123443 / 2.384e-06, |
| 1.269817e-03 * 0.903989293123443 / 2.384e-06, 1.1775017e-02 * 0.903989293123443 / 2.384e-06, |
| -2.3907185e-02 * 0.903989293123443 / 2.384e-06, -3.622532e-03 * 0.903989293123443 / 2.384e-06, |
| -4.38213e-04 * 0.903989293123443 / 2.384e-06, -2.5272e-05 * 0.903989293123443 / 2.384e-06, |
| 4.729647758913199e-01, |
| 1.268786568327291e+00, |
| |
| |
| -9.54e-07 * 0.92387953251128675613 / 2.384e-06, |
| 1.06812e-04 * 0.92387953251128675613 / 2.384e-06, |
| 6.74248e-04 * 0.92387953251128675613 / 2.384e-06, |
| 3.3379e-05 * 0.92387953251128675613 / 2.384e-06, |
| 3.4412861e-02 * 0.92387953251128675613 / 2.384e-06, |
| 4.573822e-03 * 0.92387953251128675613 / 2.384e-06, |
| 9.54151e-04 * 0.92387953251128675613 / 2.384e-06, |
| 7.6771e-05 * 0.92387953251128675613 / 2.384e-06, |
| 6.199e-06 * 0.92387953251128675613 / 2.384e-06, 3.4332e-05 * 0.92387953251128675613 / 2.384e-06, |
| 1.111031e-03 * 0.92387953251128675613 / 2.384e-06, |
| 1.0933399e-02 * 0.92387953251128675613 / 2.384e-06, |
| -2.4725437e-02 * 0.92387953251128675613 / 2.384e-06, |
| -3.771782e-03 * 0.92387953251128675613 / 2.384e-06, |
| -4.72546e-04 * 0.92387953251128675613 / 2.384e-06, |
| -2.7657e-05 * 0.92387953251128675613 / 2.384e-06, |
| 4.1421356237309504879e-01, /* tan(PI/8) */ |
| 1.414213562373095e+00, |
| |
| |
| -9.54e-07 * 0.941544065183021 / 2.384e-06, 1.05381e-04 * 0.941544065183021 / 2.384e-06, |
| 6.10352e-04 * 0.941544065183021 / 2.384e-06, -4.75883e-04 * 0.941544065183021 / 2.384e-06, |
| 3.4055710e-02 * 0.941544065183021 / 2.384e-06, 4.649162e-03 * 0.941544065183021 / 2.384e-06, 9.35555e-04 * 0.941544065183021 / 2.384e-06, 7.3433e-05 * 0.941544065183021 / 2.384e-06, /* 7 */ |
| 5.245e-06 * 0.941544065183021 / 2.384e-06, 1.7166e-05 * 0.941544065183021 / 2.384e-06, |
| 9.56535e-04 * 0.941544065183021 / 2.384e-06, 1.0103703e-02 * 0.941544065183021 / 2.384e-06, |
| -2.5527000e-02 * 0.941544065183021 / 2.384e-06, -3.914356e-03 * 0.941544065183021 / 2.384e-06, |
| -5.07355e-04 * 0.941544065183021 / 2.384e-06, -3.0041e-05 * 0.941544065183021 / 2.384e-06, |
| 3.578057213145241e-01, |
| 1.546020906725474e+00, |
| |
| |
| -9.54e-07 * 0.956940335732209 / 2.384e-06, 1.02520e-04 * 0.956940335732209 / 2.384e-06, |
| 5.39303e-04 * 0.956940335732209 / 2.384e-06, -1.011848e-03 * 0.956940335732209 / 2.384e-06, |
| 3.3659935e-02 * 0.956940335732209 / 2.384e-06, 4.703045e-03 * 0.956940335732209 / 2.384e-06, 9.15051e-04 * 0.956940335732209 / 2.384e-06, 7.0095e-05 * 0.956940335732209 / 2.384e-06, /* 6 */ |
| 4.768e-06 * 0.956940335732209 / 2.384e-06, 9.54e-07 * 0.956940335732209 / 2.384e-06, |
| 8.06808e-04 * 0.956940335732209 / 2.384e-06, 9.287834e-03 * 0.956940335732209 / 2.384e-06, |
| -2.6310921e-02 * 0.956940335732209 / 2.384e-06, -4.048824e-03 * 0.956940335732209 / 2.384e-06, |
| -5.42164e-04 * 0.956940335732209 / 2.384e-06, -3.2425e-05 * 0.956940335732209 / 2.384e-06, |
| 3.033466836073424e-01, |
| 1.662939224605090e+00, |
| |
| |
| -1.431e-06 * 0.970031253194544 / 2.384e-06, 9.9182e-05 * 0.970031253194544 / 2.384e-06, |
| 4.62532e-04 * 0.970031253194544 / 2.384e-06, -1.573563e-03 * 0.970031253194544 / 2.384e-06, |
| 3.3225536e-02 * 0.970031253194544 / 2.384e-06, 4.737377e-03 * 0.970031253194544 / 2.384e-06, 8.91685e-04 * 0.970031253194544 / 2.384e-06, 6.6280e-05 * 0.970031253194544 / 2.384e-06, /* 5 */ |
| 4.292e-06 * 0.970031253194544 / 2.384e-06, -1.3828e-05 * 0.970031253194544 / 2.384e-06, |
| 6.61850e-04 * 0.970031253194544 / 2.384e-06, 8.487225e-03 * 0.970031253194544 / 2.384e-06, |
| -2.7073860e-02 * 0.970031253194544 / 2.384e-06, -4.174709e-03 * 0.970031253194544 / 2.384e-06, |
| -5.76973e-04 * 0.970031253194544 / 2.384e-06, -3.4809e-05 * 0.970031253194544 / 2.384e-06, |
| 2.504869601913055e-01, |
| 1.763842528696710e+00, |
| |
| |
| -1.431e-06 * 0.98078528040323 / 2.384e-06, 9.5367e-05 * 0.98078528040323 / 2.384e-06, |
| 3.78609e-04 * 0.98078528040323 / 2.384e-06, -2.161503e-03 * 0.98078528040323 / 2.384e-06, |
| 3.2754898e-02 * 0.98078528040323 / 2.384e-06, 4.752159e-03 * 0.98078528040323 / 2.384e-06, 8.66413e-04 * 0.98078528040323 / 2.384e-06, 6.2943e-05 * 0.98078528040323 / 2.384e-06, /* 4 */ |
| 3.815e-06 * 0.98078528040323 / 2.384e-06, -2.718e-05 * 0.98078528040323 / 2.384e-06, |
| 5.22137e-04 * 0.98078528040323 / 2.384e-06, 7.703304e-03 * 0.98078528040323 / 2.384e-06, |
| -2.7815342e-02 * 0.98078528040323 / 2.384e-06, -4.290581e-03 * 0.98078528040323 / 2.384e-06, |
| -6.11782e-04 * 0.98078528040323 / 2.384e-06, -3.7670e-05 * 0.98078528040323 / 2.384e-06, |
| 1.989123673796580e-01, |
| 1.847759065022573e+00, |
| |
| |
| -1.907e-06 * 0.989176509964781 / 2.384e-06, 9.0122e-05 * 0.989176509964781 / 2.384e-06, |
| 2.88486e-04 * 0.989176509964781 / 2.384e-06, -2.774239e-03 * 0.989176509964781 / 2.384e-06, |
| 3.2248020e-02 * 0.989176509964781 / 2.384e-06, 4.748821e-03 * 0.989176509964781 / 2.384e-06, 8.38757e-04 * 0.989176509964781 / 2.384e-06, 5.9605e-05 * 0.989176509964781 / 2.384e-06, /* 3 */ |
| 3.338e-06 * 0.989176509964781 / 2.384e-06, -3.9577e-05 * 0.989176509964781 / 2.384e-06, |
| 3.88145e-04 * 0.989176509964781 / 2.384e-06, 6.937027e-03 * 0.989176509964781 / 2.384e-06, |
| -2.8532982e-02 * 0.989176509964781 / 2.384e-06, -4.395962e-03 * 0.989176509964781 / 2.384e-06, |
| -6.46591e-04 * 0.989176509964781 / 2.384e-06, -4.0531e-05 * 0.989176509964781 / 2.384e-06, |
| 1.483359875383474e-01, |
| 1.913880671464418e+00, |
| |
| |
| -1.907e-06 * 0.995184726672197 / 2.384e-06, 8.4400e-05 * 0.995184726672197 / 2.384e-06, |
| 1.91689e-04 * 0.995184726672197 / 2.384e-06, -3.411293e-03 * 0.995184726672197 / 2.384e-06, |
| 3.1706810e-02 * 0.995184726672197 / 2.384e-06, 4.728317e-03 * 0.995184726672197 / 2.384e-06, |
| 8.09669e-04 * 0.995184726672197 / 2.384e-06, 5.579e-05 * 0.995184726672197 / 2.384e-06, |
| 3.338e-06 * 0.995184726672197 / 2.384e-06, -5.0545e-05 * 0.995184726672197 / 2.384e-06, |
| 2.59876e-04 * 0.995184726672197 / 2.384e-06, 6.189346e-03 * 0.995184726672197 / 2.384e-06, |
| -2.9224873e-02 * 0.995184726672197 / 2.384e-06, -4.489899e-03 * 0.995184726672197 / 2.384e-06, |
| -6.80923e-04 * 0.995184726672197 / 2.384e-06, -4.3392e-05 * 0.995184726672197 / 2.384e-06, |
| 9.849140335716425e-02, |
| 1.961570560806461e+00, |
| |
| |
| -2.384e-06 * 0.998795456205172 / 2.384e-06, 7.7724e-05 * 0.998795456205172 / 2.384e-06, |
| 8.8215e-05 * 0.998795456205172 / 2.384e-06, -4.072189e-03 * 0.998795456205172 / 2.384e-06, |
| 3.1132698e-02 * 0.998795456205172 / 2.384e-06, 4.691124e-03 * 0.998795456205172 / 2.384e-06, |
| 7.79152e-04 * 0.998795456205172 / 2.384e-06, 5.2929e-05 * 0.998795456205172 / 2.384e-06, |
| 2.861e-06 * 0.998795456205172 / 2.384e-06, -6.0558e-05 * 0.998795456205172 / 2.384e-06, |
| 1.37329e-04 * 0.998795456205172 / 2.384e-06, 5.462170e-03 * 0.998795456205172 / 2.384e-06, |
| -2.9890060e-02 * 0.998795456205172 / 2.384e-06, -4.570484e-03 * 0.998795456205172 / 2.384e-06, |
| -7.14302e-04 * 0.998795456205172 / 2.384e-06, -4.6253e-05 * 0.998795456205172 / 2.384e-06, |
| 4.912684976946725e-02, |
| 1.990369453344394e+00, |
| |
| |
| 3.5780907e-02 * SQRT2 * 0.5 / 2.384e-06, 1.7876148e-02 * SQRT2 * 0.5 / 2.384e-06, |
| 3.134727e-03 * SQRT2 * 0.5 / 2.384e-06, 2.457142e-03 * SQRT2 * 0.5 / 2.384e-06, |
| 9.71317e-04 * SQRT2 * 0.5 / 2.384e-06, 2.18868e-04 * SQRT2 * 0.5 / 2.384e-06, |
| 1.01566e-04 * SQRT2 * 0.5 / 2.384e-06, 1.3828e-05 * SQRT2 * 0.5 / 2.384e-06, |
| |
| 3.0526638e-02 / 2.384e-06, 4.638195e-03 / 2.384e-06, 7.47204e-04 / 2.384e-06, |
| 4.9591e-05 / 2.384e-06, |
| 4.756451e-03 / 2.384e-06, 2.1458e-05 / 2.384e-06, -6.9618e-05 / 2.384e-06, /* 2.384e-06/2.384e-06 */ |
| }; |
| #endif |
| |
| |
| #define NS 12 |
| #define NL 36 |
| |
| static const FLOAT win[4][NL] = { |
| { |
| 2.382191739347913e-13, |
| 6.423305872147834e-13, |
| 9.400849094049688e-13, |
| 1.122435026096556e-12, |
| 1.183840321267481e-12, |
| 1.122435026096556e-12, |
| 9.400849094049690e-13, |
| 6.423305872147839e-13, |
| 2.382191739347918e-13, |
| |
| 5.456116108943412e-12, |
| 4.878985199565852e-12, |
| 4.240448995017367e-12, |
| 3.559909094758252e-12, |
| 2.858043359288075e-12, |
| 2.156177623817898e-12, |
| 1.475637723558783e-12, |
| 8.371015190102974e-13, |
| 2.599706096327376e-13, |
| |
| -5.456116108943412e-12, |
| -4.878985199565852e-12, |
| -4.240448995017367e-12, |
| -3.559909094758252e-12, |
| -2.858043359288076e-12, |
| -2.156177623817898e-12, |
| -1.475637723558783e-12, |
| -8.371015190102975e-13, |
| -2.599706096327376e-13, |
| |
| -2.382191739347923e-13, |
| -6.423305872147843e-13, |
| -9.400849094049696e-13, |
| -1.122435026096556e-12, |
| -1.183840321267481e-12, |
| -1.122435026096556e-12, |
| -9.400849094049694e-13, |
| -6.423305872147840e-13, |
| -2.382191739347918e-13, |
| }, |
| { |
| 2.382191739347913e-13, |
| 6.423305872147834e-13, |
| 9.400849094049688e-13, |
| 1.122435026096556e-12, |
| 1.183840321267481e-12, |
| 1.122435026096556e-12, |
| 9.400849094049688e-13, |
| 6.423305872147841e-13, |
| 2.382191739347918e-13, |
| |
| 5.456116108943413e-12, |
| 4.878985199565852e-12, |
| 4.240448995017367e-12, |
| 3.559909094758253e-12, |
| 2.858043359288075e-12, |
| 2.156177623817898e-12, |
| 1.475637723558782e-12, |
| 8.371015190102975e-13, |
| 2.599706096327376e-13, |
| |
| -5.461314069809755e-12, |
| -4.921085770524055e-12, |
| -4.343405037091838e-12, |
| -3.732668368707687e-12, |
| -3.093523840190885e-12, |
| -2.430835727329465e-12, |
| -1.734679010007751e-12, |
| -9.748253656609281e-13, |
| -2.797435120168326e-13, |
| |
| 0.000000000000000e+00, |
| 0.000000000000000e+00, |
| 0.000000000000000e+00, |
| 0.000000000000000e+00, |
| 0.000000000000000e+00, |
| 0.000000000000000e+00, |
| -2.283748241799531e-13, |
| -4.037858874020686e-13, |
| -2.146547464825323e-13, |
| }, |
| { |
| 1.316524975873958e-01, /* win[SHORT_TYPE] */ |
| 4.142135623730950e-01, |
| 7.673269879789602e-01, |
| |
| 1.091308501069271e+00, /* tantab_l */ |
| 1.303225372841206e+00, |
| 1.569685577117490e+00, |
| 1.920982126971166e+00, |
| 2.414213562373094e+00, |
| 3.171594802363212e+00, |
| 4.510708503662055e+00, |
| 7.595754112725146e+00, |
| 2.290376554843115e+01, |
| |
| 0.98480775301220802032, /* cx */ |
| 0.64278760968653936292, |
| 0.34202014332566882393, |
| 0.93969262078590842791, |
| -0.17364817766693030343, |
| -0.76604444311897790243, |
| 0.86602540378443870761, |
| 0.500000000000000e+00, |
| |
| -5.144957554275265e-01, /* ca */ |
| -4.717319685649723e-01, |
| -3.133774542039019e-01, |
| -1.819131996109812e-01, |
| -9.457419252642064e-02, |
| -4.096558288530405e-02, |
| -1.419856857247115e-02, |
| -3.699974673760037e-03, |
| |
| 8.574929257125442e-01, /* cs */ |
| 8.817419973177052e-01, |
| 9.496286491027329e-01, |
| 9.833145924917901e-01, |
| 9.955178160675857e-01, |
| 9.991605581781475e-01, |
| 9.998991952444470e-01, |
| 9.999931550702802e-01, |
| }, |
| { |
| 0.000000000000000e+00, |
| 0.000000000000000e+00, |
| 0.000000000000000e+00, |
| 0.000000000000000e+00, |
| 0.000000000000000e+00, |
| 0.000000000000000e+00, |
| 2.283748241799531e-13, |
| 4.037858874020686e-13, |
| 2.146547464825323e-13, |
| |
| 5.461314069809755e-12, |
| 4.921085770524055e-12, |
| 4.343405037091838e-12, |
| 3.732668368707687e-12, |
| 3.093523840190885e-12, |
| 2.430835727329466e-12, |
| 1.734679010007751e-12, |
| 9.748253656609281e-13, |
| 2.797435120168326e-13, |
| |
| -5.456116108943413e-12, |
| -4.878985199565852e-12, |
| -4.240448995017367e-12, |
| -3.559909094758253e-12, |
| -2.858043359288075e-12, |
| -2.156177623817898e-12, |
| -1.475637723558782e-12, |
| -8.371015190102975e-13, |
| -2.599706096327376e-13, |
| |
| -2.382191739347913e-13, |
| -6.423305872147834e-13, |
| -9.400849094049688e-13, |
| -1.122435026096556e-12, |
| -1.183840321267481e-12, |
| -1.122435026096556e-12, |
| -9.400849094049688e-13, |
| -6.423305872147841e-13, |
| -2.382191739347918e-13, |
| } |
| }; |
| |
| #define tantab_l (win[SHORT_TYPE]+3) |
| #define cx (win[SHORT_TYPE]+12) |
| #define ca (win[SHORT_TYPE]+20) |
| #define cs (win[SHORT_TYPE]+28) |
| |
| /************************************************************************ |
| * |
| * window_subband() |
| * |
| * PURPOSE: Overlapping window on PCM samples |
| * |
| * SEMANTICS: |
| * 32 16-bit pcm samples are scaled to fractional 2's complement and |
| * concatenated to the end of the window buffer #x#. The updated window |
| * buffer #x# is then windowed by the analysis window #c# to produce the |
| * windowed sample #z# |
| * |
| ************************************************************************/ |
| |
| /* |
| * new IDCT routine written by Takehiro TOMINAGA |
| */ |
| static const int order[] = { |
| 0, 1, 16, 17, 8, 9, 24, 25, 4, 5, 20, 21, 12, 13, 28, 29, |
| 2, 3, 18, 19, 10, 11, 26, 27, 6, 7, 22, 23, 14, 15, 30, 31 |
| }; |
| |
| |
| /* returns sum_j=0^31 a[j]*cos(PI*j*(k+1/2)/32), 0<=k<32 */ |
| inline static void |
| window_subband(const sample_t * x1, FLOAT a[SBLIMIT]) |
| { |
| int i; |
| FLOAT const *wp = enwindow + 10; |
| |
| const sample_t *x2 = &x1[238 - 14 - 286]; |
| |
| for (i = -15; i < 0; i++) { |
| FLOAT w, s, t; |
| |
| w = wp[-10]; |
| s = x2[-224] * w; |
| t = x1[224] * w; |
| w = wp[-9]; |
| s += x2[-160] * w; |
| t += x1[160] * w; |
| w = wp[-8]; |
| s += x2[-96] * w; |
| t += x1[96] * w; |
| w = wp[-7]; |
| s += x2[-32] * w; |
| t += x1[32] * w; |
| w = wp[-6]; |
| s += x2[32] * w; |
| t += x1[-32] * w; |
| w = wp[-5]; |
| s += x2[96] * w; |
| t += x1[-96] * w; |
| w = wp[-4]; |
| s += x2[160] * w; |
| t += x1[-160] * w; |
| w = wp[-3]; |
| s += x2[224] * w; |
| t += x1[-224] * w; |
| |
| w = wp[-2]; |
| s += x1[-256] * w; |
| t -= x2[256] * w; |
| w = wp[-1]; |
| s += x1[-192] * w; |
| t -= x2[192] * w; |
| w = wp[0]; |
| s += x1[-128] * w; |
| t -= x2[128] * w; |
| w = wp[1]; |
| s += x1[-64] * w; |
| t -= x2[64] * w; |
| w = wp[2]; |
| s += x1[0] * w; |
| t -= x2[0] * w; |
| w = wp[3]; |
| s += x1[64] * w; |
| t -= x2[-64] * w; |
| w = wp[4]; |
| s += x1[128] * w; |
| t -= x2[-128] * w; |
| w = wp[5]; |
| s += x1[192] * w; |
| t -= x2[-192] * w; |
| |
| /* |
| * this multiplyer could be removed, but it needs more 256 FLOAT data. |
| * thinking about the data cache performance, I think we should not |
| * use such a huge table. tt 2000/Oct/25 |
| */ |
| s *= wp[6]; |
| w = t - s; |
| a[30 + i * 2] = t + s; |
| a[31 + i * 2] = wp[7] * w; |
| wp += 18; |
| x1--; |
| x2++; |
| } |
| { |
| FLOAT s, t, u, v; |
| t = x1[-16] * wp[-10]; |
| s = x1[-32] * wp[-2]; |
| t += (x1[-48] - x1[16]) * wp[-9]; |
| s += x1[-96] * wp[-1]; |
| t += (x1[-80] + x1[48]) * wp[-8]; |
| s += x1[-160] * wp[0]; |
| t += (x1[-112] - x1[80]) * wp[-7]; |
| s += x1[-224] * wp[1]; |
| t += (x1[-144] + x1[112]) * wp[-6]; |
| s -= x1[32] * wp[2]; |
| t += (x1[-176] - x1[144]) * wp[-5]; |
| s -= x1[96] * wp[3]; |
| t += (x1[-208] + x1[176]) * wp[-4]; |
| s -= x1[160] * wp[4]; |
| t += (x1[-240] - x1[208]) * wp[-3]; |
| s -= x1[224]; |
| |
| u = s - t; |
| v = s + t; |
| |
| t = a[14]; |
| s = a[15] - t; |
| |
| a[31] = v + t; /* A0 */ |
| a[30] = u + s; /* A1 */ |
| a[15] = u - s; /* A2 */ |
| a[14] = v - t; /* A3 */ |
| } |
| { |
| FLOAT xr; |
| xr = a[28] - a[0]; |
| a[0] += a[28]; |
| a[28] = xr * wp[-2 * 18 + 7]; |
| xr = a[29] - a[1]; |
| a[1] += a[29]; |
| a[29] = xr * wp[-2 * 18 + 7]; |
| |
| xr = a[26] - a[2]; |
| a[2] += a[26]; |
| a[26] = xr * wp[-4 * 18 + 7]; |
| xr = a[27] - a[3]; |
| a[3] += a[27]; |
| a[27] = xr * wp[-4 * 18 + 7]; |
| |
| xr = a[24] - a[4]; |
| a[4] += a[24]; |
| a[24] = xr * wp[-6 * 18 + 7]; |
| xr = a[25] - a[5]; |
| a[5] += a[25]; |
| a[25] = xr * wp[-6 * 18 + 7]; |
| |
| xr = a[22] - a[6]; |
| a[6] += a[22]; |
| a[22] = xr * SQRT2; |
| xr = a[23] - a[7]; |
| a[7] += a[23]; |
| a[23] = xr * SQRT2 - a[7]; |
| a[7] -= a[6]; |
| a[22] -= a[7]; |
| a[23] -= a[22]; |
| |
| xr = a[6]; |
| a[6] = a[31] - xr; |
| a[31] = a[31] + xr; |
| xr = a[7]; |
| a[7] = a[30] - xr; |
| a[30] = a[30] + xr; |
| xr = a[22]; |
| a[22] = a[15] - xr; |
| a[15] = a[15] + xr; |
| xr = a[23]; |
| a[23] = a[14] - xr; |
| a[14] = a[14] + xr; |
| |
| xr = a[20] - a[8]; |
| a[8] += a[20]; |
| a[20] = xr * wp[-10 * 18 + 7]; |
| xr = a[21] - a[9]; |
| a[9] += a[21]; |
| a[21] = xr * wp[-10 * 18 + 7]; |
| |
| xr = a[18] - a[10]; |
| a[10] += a[18]; |
| a[18] = xr * wp[-12 * 18 + 7]; |
| xr = a[19] - a[11]; |
| a[11] += a[19]; |
| a[19] = xr * wp[-12 * 18 + 7]; |
| |
| xr = a[16] - a[12]; |
| a[12] += a[16]; |
| a[16] = xr * wp[-14 * 18 + 7]; |
| xr = a[17] - a[13]; |
| a[13] += a[17]; |
| a[17] = xr * wp[-14 * 18 + 7]; |
| |
| xr = -a[20] + a[24]; |
| a[20] += a[24]; |
| a[24] = xr * wp[-12 * 18 + 7]; |
| xr = -a[21] + a[25]; |
| a[21] += a[25]; |
| a[25] = xr * wp[-12 * 18 + 7]; |
| |
| xr = a[4] - a[8]; |
| a[4] += a[8]; |
| a[8] = xr * wp[-12 * 18 + 7]; |
| xr = a[5] - a[9]; |
| a[5] += a[9]; |
| a[9] = xr * wp[-12 * 18 + 7]; |
| |
| xr = a[0] - a[12]; |
| a[0] += a[12]; |
| a[12] = xr * wp[-4 * 18 + 7]; |
| xr = a[1] - a[13]; |
| a[1] += a[13]; |
| a[13] = xr * wp[-4 * 18 + 7]; |
| xr = a[16] - a[28]; |
| a[16] += a[28]; |
| a[28] = xr * wp[-4 * 18 + 7]; |
| xr = -a[17] + a[29]; |
| a[17] += a[29]; |
| a[29] = xr * wp[-4 * 18 + 7]; |
| |
| xr = SQRT2 * (a[2] - a[10]); |
| a[2] += a[10]; |
| a[10] = xr; |
| xr = SQRT2 * (a[3] - a[11]); |
| a[3] += a[11]; |
| a[11] = xr; |
| xr = SQRT2 * (-a[18] + a[26]); |
| a[18] += a[26]; |
| a[26] = xr - a[18]; |
| xr = SQRT2 * (-a[19] + a[27]); |
| a[19] += a[27]; |
| a[27] = xr - a[19]; |
| |
| xr = a[2]; |
| a[19] -= a[3]; |
| a[3] -= xr; |
| a[2] = a[31] - xr; |
| a[31] += xr; |
| xr = a[3]; |
| a[11] -= a[19]; |
| a[18] -= xr; |
| a[3] = a[30] - xr; |
| a[30] += xr; |
| xr = a[18]; |
| a[27] -= a[11]; |
| a[19] -= xr; |
| a[18] = a[15] - xr; |
| a[15] += xr; |
| |
| xr = a[19]; |
| a[10] -= xr; |
| a[19] = a[14] - xr; |
| a[14] += xr; |
| xr = a[10]; |
| a[11] -= xr; |
| a[10] = a[23] - xr; |
| a[23] += xr; |
| xr = a[11]; |
| a[26] -= xr; |
| a[11] = a[22] - xr; |
| a[22] += xr; |
| xr = a[26]; |
| a[27] -= xr; |
| a[26] = a[7] - xr; |
| a[7] += xr; |
| |
| xr = a[27]; |
| a[27] = a[6] - xr; |
| a[6] += xr; |
| |
| xr = SQRT2 * (a[0] - a[4]); |
| a[0] += a[4]; |
| a[4] = xr; |
| xr = SQRT2 * (a[1] - a[5]); |
| a[1] += a[5]; |
| a[5] = xr; |
| xr = SQRT2 * (a[16] - a[20]); |
| a[16] += a[20]; |
| a[20] = xr; |
| xr = SQRT2 * (a[17] - a[21]); |
| a[17] += a[21]; |
| a[21] = xr; |
| |
| xr = -SQRT2 * (a[8] - a[12]); |
| a[8] += a[12]; |
| a[12] = xr - a[8]; |
| xr = -SQRT2 * (a[9] - a[13]); |
| a[9] += a[13]; |
| a[13] = xr - a[9]; |
| xr = -SQRT2 * (a[25] - a[29]); |
| a[25] += a[29]; |
| a[29] = xr - a[25]; |
| xr = -SQRT2 * (a[24] + a[28]); |
| a[24] -= a[28]; |
| a[28] = xr - a[24]; |
| |
| xr = a[24] - a[16]; |
| a[24] = xr; |
| xr = a[20] - xr; |
| a[20] = xr; |
| xr = a[28] - xr; |
| a[28] = xr; |
| |
| xr = a[25] - a[17]; |
| a[25] = xr; |
| xr = a[21] - xr; |
| a[21] = xr; |
| xr = a[29] - xr; |
| a[29] = xr; |
| |
| xr = a[17] - a[1]; |
| a[17] = xr; |
| xr = a[9] - xr; |
| a[9] = xr; |
| xr = a[25] - xr; |
| a[25] = xr; |
| xr = a[5] - xr; |
| a[5] = xr; |
| xr = a[21] - xr; |
| a[21] = xr; |
| xr = a[13] - xr; |
| a[13] = xr; |
| xr = a[29] - xr; |
| a[29] = xr; |
| |
| xr = a[1] - a[0]; |
| a[1] = xr; |
| xr = a[16] - xr; |
| a[16] = xr; |
| xr = a[17] - xr; |
| a[17] = xr; |
| xr = a[8] - xr; |
| a[8] = xr; |
| xr = a[9] - xr; |
| a[9] = xr; |
| xr = a[24] - xr; |
| a[24] = xr; |
| xr = a[25] - xr; |
| a[25] = xr; |
| xr = a[4] - xr; |
| a[4] = xr; |
| xr = a[5] - xr; |
| a[5] = xr; |
| xr = a[20] - xr; |
| a[20] = xr; |
| xr = a[21] - xr; |
| a[21] = xr; |
| xr = a[12] - xr; |
| a[12] = xr; |
| xr = a[13] - xr; |
| a[13] = xr; |
| xr = a[28] - xr; |
| a[28] = xr; |
| xr = a[29] - xr; |
| a[29] = xr; |
| |
| xr = a[0]; |
| a[0] += a[31]; |
| a[31] -= xr; |
| xr = a[1]; |
| a[1] += a[30]; |
| a[30] -= xr; |
| xr = a[16]; |
| a[16] += a[15]; |
| a[15] -= xr; |
| xr = a[17]; |
| a[17] += a[14]; |
| a[14] -= xr; |
| xr = a[8]; |
| a[8] += a[23]; |
| a[23] -= xr; |
| xr = a[9]; |
| a[9] += a[22]; |
| a[22] -= xr; |
| xr = a[24]; |
| a[24] += a[7]; |
| a[7] -= xr; |
| xr = a[25]; |
| a[25] += a[6]; |
| a[6] -= xr; |
| xr = a[4]; |
| a[4] += a[27]; |
| a[27] -= xr; |
| xr = a[5]; |
| a[5] += a[26]; |
| a[26] -= xr; |
| xr = a[20]; |
| a[20] += a[11]; |
| a[11] -= xr; |
| xr = a[21]; |
| a[21] += a[10]; |
| a[10] -= xr; |
| xr = a[12]; |
| a[12] += a[19]; |
| a[19] -= xr; |
| xr = a[13]; |
| a[13] += a[18]; |
| a[18] -= xr; |
| xr = a[28]; |
| a[28] += a[3]; |
| a[3] -= xr; |
| xr = a[29]; |
| a[29] += a[2]; |
| a[2] -= xr; |
| } |
| |
| } |
| |
| |
| /*-------------------------------------------------------------------*/ |
| /* */ |
| /* Function: Calculation of the MDCT */ |
| /* In the case of long blocks (type 0,1,3) there are */ |
| /* 36 coefficents in the time domain and 18 in the frequency */ |
| /* domain. */ |
| /* In the case of short blocks (type 2) there are 3 */ |
| /* transformations with short length. This leads to 12 coefficents */ |
| /* in the time and 6 in the frequency domain. In this case the */ |
| /* results are stored side by side in the vector out[]. */ |
| /* */ |
| /* New layer3 */ |
| /* */ |
| /*-------------------------------------------------------------------*/ |
| |
| inline static void |
| mdct_short(FLOAT * inout) |
| { |
| int l; |
| for (l = 0; l < 3; l++) { |
| FLOAT tc0, tc1, tc2, ts0, ts1, ts2; |
| |
| ts0 = inout[2 * 3] * win[SHORT_TYPE][0] - inout[5 * 3]; |
| tc0 = inout[0 * 3] * win[SHORT_TYPE][2] - inout[3 * 3]; |
| tc1 = ts0 + tc0; |
| tc2 = ts0 - tc0; |
| |
| ts0 = inout[5 * 3] * win[SHORT_TYPE][0] + inout[2 * 3]; |
| tc0 = inout[3 * 3] * win[SHORT_TYPE][2] + inout[0 * 3]; |
| ts1 = ts0 + tc0; |
| ts2 = -ts0 + tc0; |
| |
| tc0 = (inout[1 * 3] * win[SHORT_TYPE][1] - inout[4 * 3]) * 2.069978111953089e-11; /* tritab_s[1] */ |
| ts0 = (inout[4 * 3] * win[SHORT_TYPE][1] + inout[1 * 3]) * 2.069978111953089e-11; /* tritab_s[1] */ |
| |
| inout[3 * 0] = tc1 * 1.907525191737280e-11 /* tritab_s[2] */ + tc0; |
| inout[3 * 5] = -ts1 * 1.907525191737280e-11 /* tritab_s[0] */ + ts0; |
| |
| tc2 = tc2 * 0.86602540378443870761 * 1.907525191737281e-11 /* tritab_s[2] */ ; |
| ts1 = ts1 * 0.5 * 1.907525191737281e-11 + ts0; |
| inout[3 * 1] = tc2 - ts1; |
| inout[3 * 2] = tc2 + ts1; |
| |
| tc1 = tc1 * 0.5 * 1.907525191737281e-11 - tc0; |
| ts2 = ts2 * 0.86602540378443870761 * 1.907525191737281e-11 /* tritab_s[0] */ ; |
| inout[3 * 3] = tc1 + ts2; |
| inout[3 * 4] = tc1 - ts2; |
| |
| inout++; |
| } |
| } |
| |
| inline static void |
| mdct_long(FLOAT * out, FLOAT const *in) |
| { |
| FLOAT ct, st; |
| { |
| FLOAT tc1, tc2, tc3, tc4, ts5, ts6, ts7, ts8; |
| /* 1,2, 5,6, 9,10, 13,14, 17 */ |
| tc1 = in[17] - in[9]; |
| tc3 = in[15] - in[11]; |
| tc4 = in[14] - in[12]; |
| ts5 = in[0] + in[8]; |
| ts6 = in[1] + in[7]; |
| ts7 = in[2] + in[6]; |
| ts8 = in[3] + in[5]; |
| |
| out[17] = (ts5 + ts7 - ts8) - (ts6 - in[4]); |
| st = (ts5 + ts7 - ts8) * cx[7] + (ts6 - in[4]); |
| ct = (tc1 - tc3 - tc4) * cx[6]; |
| out[5] = ct + st; |
| out[6] = ct - st; |
| |
| tc2 = (in[16] - in[10]) * cx[6]; |
| ts6 = ts6 * cx[7] + in[4]; |
| ct = tc1 * cx[0] + tc2 + tc3 * cx[1] + tc4 * cx[2]; |
| st = -ts5 * cx[4] + ts6 - ts7 * cx[5] + ts8 * cx[3]; |
| out[1] = ct + st; |
| out[2] = ct - st; |
| |
| ct = tc1 * cx[1] - tc2 - tc3 * cx[2] + tc4 * cx[0]; |
| st = -ts5 * cx[5] + ts6 - ts7 * cx[3] + ts8 * cx[4]; |
| out[9] = ct + st; |
| out[10] = ct - st; |
| |
| ct = tc1 * cx[2] - tc2 + tc3 * cx[0] - tc4 * cx[1]; |
| st = ts5 * cx[3] - ts6 + ts7 * cx[4] - ts8 * cx[5]; |
| out[13] = ct + st; |
| out[14] = ct - st; |
| } |
| { |
| FLOAT ts1, ts2, ts3, ts4, tc5, tc6, tc7, tc8; |
| |
| ts1 = in[8] - in[0]; |
| ts3 = in[6] - in[2]; |
| ts4 = in[5] - in[3]; |
| tc5 = in[17] + in[9]; |
| tc6 = in[16] + in[10]; |
| tc7 = in[15] + in[11]; |
| tc8 = in[14] + in[12]; |
| |
| out[0] = (tc5 + tc7 + tc8) + (tc6 + in[13]); |
| ct = (tc5 + tc7 + tc8) * cx[7] - (tc6 + in[13]); |
| st = (ts1 - ts3 + ts4) * cx[6]; |
| out[11] = ct + st; |
| out[12] = ct - st; |
| |
| ts2 = (in[7] - in[1]) * cx[6]; |
| tc6 = in[13] - tc6 * cx[7]; |
| ct = tc5 * cx[3] - tc6 + tc7 * cx[4] + tc8 * cx[5]; |
| st = ts1 * cx[2] + ts2 + ts3 * cx[0] + ts4 * cx[1]; |
| out[3] = ct + st; |
| out[4] = ct - st; |
| |
| ct = -tc5 * cx[5] + tc6 - tc7 * cx[3] - tc8 * cx[4]; |
| st = ts1 * cx[1] + ts2 - ts3 * cx[2] - ts4 * cx[0]; |
| out[7] = ct + st; |
| out[8] = ct - st; |
| |
| ct = -tc5 * cx[4] + tc6 - tc7 * cx[5] - tc8 * cx[3]; |
| st = ts1 * cx[0] - ts2 + ts3 * cx[1] - ts4 * cx[2]; |
| out[15] = ct + st; |
| out[16] = ct - st; |
| } |
| } |
| |
| |
| void |
| mdct_sub48(lame_internal_flags * gfc, const sample_t * w0, const sample_t * w1) |
| { |
| int gr, k, ch; |
| const sample_t *wk; |
| |
| wk = w0 + 286; |
| /* thinking cache performance, ch->gr loop is better than gr->ch loop */ |
| for (ch = 0; ch < gfc->channels_out; ch++) { |
| for (gr = 0; gr < gfc->mode_gr; gr++) { |
| int band; |
| gr_info *const gi = &(gfc->l3_side.tt[gr][ch]); |
| FLOAT *mdct_enc = gi->xr; |
| FLOAT *samp = gfc->sb_sample[ch][1 - gr][0]; |
| |
| for (k = 0; k < 18 / 2; k++) { |
| window_subband(wk, samp); |
| window_subband(wk + 32, samp + 32); |
| samp += 64; |
| wk += 64; |
| /* |
| * Compensate for inversion in the analysis filter |
| */ |
| for (band = 1; band < 32; band += 2) { |
| samp[band - 32] *= -1; |
| } |
| } |
| |
| /* |
| * Perform imdct of 18 previous subband samples |
| * + 18 current subband samples |
| */ |
| for (band = 0; band < 32; band++, mdct_enc += 18) { |
| int type = gi->block_type; |
| FLOAT const *const band0 = gfc->sb_sample[ch][gr][0] + order[band]; |
| FLOAT *const band1 = gfc->sb_sample[ch][1 - gr][0] + order[band]; |
| if (gi->mixed_block_flag && band < 2) |
| type = 0; |
| if (gfc->amp_filter[band] < 1e-12) { |
| memset(mdct_enc, 0, 18 * sizeof(FLOAT)); |
| } |
| else { |
| if (gfc->amp_filter[band] < 1.0) { |
| for (k = 0; k < 18; k++) |
| band1[k * 32] *= gfc->amp_filter[band]; |
| } |
| if (type == SHORT_TYPE) { |
| for (k = -NS / 4; k < 0; k++) { |
| FLOAT const w = win[SHORT_TYPE][k + 3]; |
| mdct_enc[k * 3 + 9] = band0[(9 + k) * 32] * w - band0[(8 - k) * 32]; |
| mdct_enc[k * 3 + 18] = band0[(14 - k) * 32] * w + band0[(15 + k) * 32]; |
| mdct_enc[k * 3 + 10] = band0[(15 + k) * 32] * w - band0[(14 - k) * 32]; |
| mdct_enc[k * 3 + 19] = band1[(2 - k) * 32] * w + band1[(3 + k) * 32]; |
| mdct_enc[k * 3 + 11] = band1[(3 + k) * 32] * w - band1[(2 - k) * 32]; |
| mdct_enc[k * 3 + 20] = band1[(8 - k) * 32] * w + band1[(9 + k) * 32]; |
| } |
| mdct_short(mdct_enc); |
| } |
| else { |
| FLOAT work[18]; |
| for (k = -NL / 4; k < 0; k++) { |
| FLOAT a, b; |
| a = win[type][k + 27] * band1[(k + 9) * 32] |
| + win[type][k + 36] * band1[(8 - k) * 32]; |
| b = win[type][k + 9] * band0[(k + 9) * 32] |
| - win[type][k + 18] * band0[(8 - k) * 32]; |
| work[k + 9] = a - b * tantab_l[k + 9]; |
| work[k + 18] = a * tantab_l[k + 9] + b; |
| } |
| |
| mdct_long(mdct_enc, work); |
| } |
| } |
| /* |
| * Perform aliasing reduction butterfly |
| */ |
| if (type != SHORT_TYPE && band != 0) { |
| for (k = 7; k >= 0; --k) { |
| FLOAT bu, bd; |
| bu = mdct_enc[k] * ca[k] + mdct_enc[-1 - k] * cs[k]; |
| bd = mdct_enc[k] * cs[k] - mdct_enc[-1 - k] * ca[k]; |
| |
| mdct_enc[-1 - k] = bu; |
| mdct_enc[k] = bd; |
| } |
| } |
| } |
| } |
| wk = w1 + 286; |
| if (gfc->mode_gr == 1) { |
| memcpy(gfc->sb_sample[ch][0], gfc->sb_sample[ch][1], 576 * sizeof(FLOAT)); |
| } |
| } |
| } |
